Roof tool question

Hey guys,
How do I get rid of this second roof line across the garage? the step up is 250mm and is 1300 mm across the front of porch.


Roof concept.jpg

Hi Myles,

Could you please send me the model so I can do some further testing?

My initial thoughts are that there is a break in one of the edges of the shape you created the roof from. You can check this by turning your endpoints on in your style. I’ve attached an image which explain this.
Turning On Endpoints.jpg